import type { App } from "vue";
const install = function (app: App) {
  /**
   * @description: 按钮前置图标（svg）
   * @return {*}
   */
  app.directive("icon", {
    beforeMount: function (el: HTMLElement, params: { value: string }) {
      const { value } = params;
      if (!value) return;
      let icon = "";
      let style = "";
      if (typeof value === "string") {
        icon = value;
      } else {
        icon = value[0];
        style = value[1];
      }

      const SVG_NS = "http://www.w3.org/2000/svg";
      const childNS = "http://www.w3.org/1999/xlink";
      const svg = document.createElementNS(SVG_NS, "svg");
      svg.style.cssText = `display: inline-block;vertical-align: -3px;width: 16px;height: 16px;margin-right: 6px;${style}`;
      const child = document.createElementNS(SVG_NS, "use");
      child.setAttributeNS(childNS, "xlink:href", "#icon-" + icon);
      svg.appendChild(child);
      el.insertBefore(svg, el.firstChild);
    }
  });

  /**
   * @description: 弹框拖拽
   * @return {*}
   */
  app.directive("dialogDrag", {
    updated(el: HTMLElement) {
      const dialogHeaderEl = el.querySelector(".el-dialog__header") as HTMLElement;
      if (!dialogHeaderEl) return;
      const dragDom = el.querySelector(".el-dialog") as HTMLElement;
      dialogHeaderEl.style.cssText += ";cursor:move;";
      dragDom.style.cssText += ";top:0px;";

      // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
      const getStyle = (function () {
        if ((window.document as any).currentStyle) {
          return (dom: any, attr: any) => dom.currentStyle[attr];
        } else {
          return (dom: any, attr: any) => getComputedStyle(dom)[attr];
        }
      })();

      dialogHeaderEl.onmousedown = (e: any) => {
        // 鼠标按下，计算当前元素距离可视区的距离
        const disX = e.clientX - dialogHeaderEl.offsetLeft;
        const disY = e.clientY - dialogHeaderEl.offsetTop;

        const dragDomWidth = dragDom.offsetWidth;
        const dragDomHeight = dragDom.offsetHeight;

        const screenWidth = document.body.clientWidth;
        const screenHeight = document.body.clientHeight;

        const minDragDomLeft = dragDom.offsetLeft;
        const maxDragDomLeft = screenWidth - dragDom.offsetLeft - dragDomWidth;

        const minDragDomTop = dragDom.offsetTop;
        const maxDragDomTop = screenHeight - dragDom.offsetTop - dragDomHeight;

        // 获取到的值带px 正则匹配替换
        let styL = getStyle(dragDom, "left");
        let styT = getStyle(dragDom, "top");

        if (styL.includes("%")) {
          styL = +document.body.clientWidth * (+styL.replace(/%/g, "") / 100);
          styT = +document.body.clientHeight * (+styT.replace(/%/g, "") / 100);
        } else {
          styL = +styL.replace(/\px/g, "");
          styT = +styT.replace(/\px/g, "");
        }

        document.onmousemove = function (e) {
          // 通过事件委托，计算移动的距离
          let left = e.clientX - disX;
          let top = e.clientY - disY;

          // 边界处理
          if (-left > minDragDomLeft) {
            left = -minDragDomLeft;
          } else if (left > maxDragDomLeft) {
            left = maxDragDomLeft;
          }

          if (-top > minDragDomTop) {
            top = -minDragDomTop;
          } else if (top > maxDragDomTop) {
            top = maxDragDomTop;
          }

          // 移动当前元素
          dragDom.style.cssText += `;left:${left + styL}px;top:${top + styT}px;`;
        };

        document.onmouseup = function () {
          document.onmousemove = null;
          document.onmouseup = null;
        };
      };
    }
  });
  /**
   * @description: 弹框抖动
   * @return {*}
   */
  app.directive("dialogShake", {
    updated(el: HTMLElement) {
      const dialogOverlay = el.querySelector(".el-overlay-dialog") as HTMLElement;
      const dialog = el.querySelector(".el-dialog") as HTMLElement;

      const className = "flash";
      if (!dialogOverlay) return;
      dialogOverlay.onclick = function (e: any) {
        if (e.target == dialogOverlay && !dialog.classList.contains(className)) {
          dialog.classList.add(className);
          setTimeout(() => {
            dialog.classList.remove(className);
          }, 1500);
        }
      };
    }
  });
};
export default install;
